Flat back binder



Mba/3 July 28, 1942. B. l.. PoLkosNxK FLAT BACK'BINDER Filed Feb; 2o, 1940 i lllllllivlllllllll l l l Patented July 28, 1942 UNITED, STATES PATENT OFFICE 2,290,891 i FLAT BACK BINDER Bernard L. Polkosnik, Bridgeport, Conn.

Application February 20, 1940, Serial No. 319,900

2 Claims.

This invention relates to binding devices and more particularly to a binder for perforated sheets, pamphlets or the like which maybe formed of wire and sheet metal so that it may be made very economically and at the same time serve either as a temporaryor looseleaf binder from which the boundmaterial can 'be removed, or as a permanent binder.

One object of the invention is to provide an inexpensive binding device of the character described which shall be provided with a flat plate or back portion to serve as the back of the bound material so that titles or other indicia may be placed thereon.

A further object of the invention is the provision of a binding device comprising a nat base structure of sheet material to which are pivotally secured a plurality yof wire loops which loops may readily be threaded through perforations or slots in the sheets to be bound and then readily secured either removably or permanently to the base structure to hold the leaves in place.

A still further object of the invention is the provision of a binding device of the character described, by which the leaves which are bound are held in precise opposed relation when the leaves are open.

Further objects of the invention will be apparent as the description proceeds.

In the accompanying drawing:

Fig. l is a front plan View of a book or pamphlet having my improved binding device applied thereto;

Fig. 2 is a side view of the same;

Fig. 3 is a back view of the book or pamphlet;

Fig. 4 is a sectional view on line 4-4 of Fig. 1;

Fig. 5 is a top plan view of a portion of the binding device prior to the attachment ofV the leaves;

Fig. 6 is a sectional view on line 6-6 of Fig. 5;

Fig. 7 is a View similar to Fig. 6 but showing the binding device when used as a permanent binder, and

Fig. 8 is a perspective view of the wire loop forming a part of the device.

To illustrate a preferred embodiment of my invention I have shown a book or pamphlet comprising leaves I0, provided with registering openings II through which may be inserted the loops I2 of the binding device which consist principally oi these loops and a relatively at base structure or plate I3 to which these loops are pivotally secured.

As will be more fully described hereinafter the loops I2 consist of wires spaced apart, and the openings I I are shown as slots somewhat elongated, each slot receiving the wires of one loop. It will, of course, be apparent that the openings may be circular perforations if desired, so long as they are of suiicient diameter to receive the loops.

As shown in Figs. 1 to 4 inclusive, the binding device provides a at back for the bound material by virtue of the provision of the plate I3, which plate may, if desired, have on the outer surface thereof a title or any other indicia desired. As shown in Figs. 1 and 4 the sheets may lie absolutely at when they are open, so as to give access to practically the entire width of the pages for reading printed matter thereon.

The construction of the binding device will now be described. As stated, it consists of the back plate I3 and the loops I 2. The plate I3 may have its longitudinal edges folded over upon p the body thereof, as shown at I4, and tongues may be cut or struck out from these folded edges at spaced intervals. The tongues I5 upon one of the edges of the back plate will lie opposite the tongues I6 of the other edge.

The construction of the wire loop members I2 is shown more particularly in Fig. 8. As illustrated, each loop comprises spaced wire members I'I and I8 which may be bent into substantially U-shaped form to lie parallel with each other. One entire loop may be made from a single piece of wire so that at one end the spaced wires will be joined by the end portion I9 at one end of the loop and at the other end of the loop the wires may be turned in toward each other to provide the end member 20.

Each of these loops may be hinged to the base plate I3 by bending the tongues I5 over the transverse end portion 20 of the loops I2. This will serve to connect the loop p-ivotally to the plate so that it may swing freely to the dotted line positions shown in Fig. 6. The ends of the members 20 Will not be required to be secured together as it will be seen that after the tongue I5 is turned downwardly over these members they will be prevented from moving longitudinally of the plate I3 by the adjacent portions of the turned edges I4.

The tongues IB may, as shown in Fig. 6, stand in a position inclined slightly inwardly toward the median line of the plate I3 and their upper ends may be turned slightly outwardly, as shown at 2l, so that when the loop I2 has been threaded to the sheets of the material to be bound and is brought into' contact with the end 2I of the tongue I6, the latter will be sprung outwardly sprung inwardly to catch the end portion I9 of the loop. The wire of which the loops are made is also resilient and the loop may give slightly for this operation.

If it is desired to use the binder as a temporary or looseleaf binder, the tongue I6 may be left in the position shown in Fig. 6. If, however,

it is desired to permanently bind the sheets together this tongue may be pressed downwardly as shown at llia in Fig. 7, by any convenient tool. As the metal of the plate I3 will be relatively thin this operation may be very easily performed by any tool inserted between the wires I1 and I8 of the loops I2. This operation will cause the sheets to be bound permanently in a very effective manner and by a very simple operation. It may also be noted that the sheets to be bound may be assembled together in superposed relation with the openings II registering with each other, and the loops I2 may all be inserted through'these openings at the same time. Thus the binding device is not only economical to construct and positive in operation,but its application to the leaves may be effected with a minimum of effort.

The plates I3 may be provided at their ends with fibre end portions 22, which may be superposed flatwise upon the plate I3 and secured in place by having side portions I4 of the plate crimped around the body portions of the libre ends 22. The body portion of these end members about which the portions IIIa of the sheet metal back plate are crimped may be slightly smaller than the protruding portions thereof so as to provide the shoulders 23. The crimping of the end portions of the plateY I3 against the libre members 22 will provide a more nished appearanee for the binder, and also eliminate the sharp end portions of the plate which might otherwise be present.

While I have shown and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the appended claims.

What I claim ist A1. A binding for a book of perforated sheets, said binding comprising a substantially flat sheet metal plate and a series of bowed wire loops, each of said loops having the form of a closed quadrilateral ligure havin-g spaced substantially parallel side members, and end members closing the spaces at both ends of the side members, and the side members being bent into U-shaped form whereby the end members may rest upon the plate in spaced positions adjacent opposite edges thereof, said plate having its longitudinal edges folded over upon the body thereof, a series of tongues struck from said longitudinal edges, and said tongues being severally folded over the end members of the loops to secure the loops to the plate.

2. A binding for a 4book of perforated sheets, said binding comprising a substantially flat sheet metal plate and a series of bowed wire loops, each of said loops having the form of a closed quadrilateral figure having spaced substantially parallel side members, and end members closing the spaces at both ends of the side members, and the side members being bent into U-shaped form whereby the end members may rest upon the plate in spaced positions adjacent opposite edges thereof, means securing one end of each of said loops to one edge of the plate, and said plate having integrally formed tongues at the other edge thereof, said tongues being severally engaged with the end members of the loops, and the edge of the plate between said tongues being folded over on the body thereof.

BERNARD L. POLKOSNIK. 

